The outstanding features of these shear force transducers are an exceptionally robust and compact design, and a high load capacity. The decisive advantage of the shear force measuring principle is its insensitivity to transverse forces.Shear force transducers are especially suitable for applications in harsh weig-hing and industrial environments. In

comparison with other types of sensor, they are economical to manufacture and simple to adapt to customers‘ installation requirements.The standard types have three through holes for mounting. On request, we will be pleased to quote for alternative designs adapted to special force trans-mission requirements.

Measuring amplifiers can be integrated in all shear force transducers, ensuring that a broad bandwidth of output signals are at your disposal. Transducers are sup-plied with a cable as a standard feature or, alternatively, can be connected with an M12x1 plug connector.

For tension and compression loadsMeasurement ranges from 2 kN to 100 kNDesign adaptation to customer specification

Load and force measurementTest rigsDispensing systems

Shear force transducer

SK 1.x, SK 2.x

© HKM-Messtechnik GmbH Product information | Status 03/2021

2© HKM-Messtechnik GmbH Shear force transducer SK 1.x, SK 2.x | Product information | Status 03/2021

Technical data

Type SK 1.0 SK 1.1 SK 1.2 SK 1.3 SK 2.0 SK 2.1

Nominal load [kN] 2 5 10 20 50 100

Dimensions [mm]

H 30 48

B 30 48

L1 130 170

L2 15 19

L3 25 38

L4 117 152.4

D1 Ø 12.6 Ø 20.6

D2 Ø 12.6 Ø 14.5 Ø 20.6

Length of mounting surface L5 [mm] 65 84

Material Aluminium Steel Steel

Self-weight [kg] 0.3 0.7 2.3

Maximum working load* 1.1 x nominal load

Limit load* 1.5 x nominal load

Breaking load* > 3 x nominal load

Accuracy ± 0.25% f.s.** under tension or compression

Reference temperature 20°C

Nominal temperature range −10°C to + 50°C

Working temperature range − 30°C to + 80°C

Temperature coefficient of gain < 0.1% f.s.**/10K

Temperature coefficient of zero < 0.2% f.s.**/10K

Nominal deflection < 0.1 mm

Degree of protection IP 67

* The sum of the dynamic and static load is decisive** f.s. = full scale value

Dimensions

in mm

F

3© HKM-Messtechnik GmbH Shear force transducer SK 1.x, SK 2.x | Product information | Status 03/2021

Output variants without measuring amplifiers / with integrated measuring amplifiers

Version Without measuring amplifier*

Measuring amplifier with current output Measuring amplifier with voltage output

Measuring amp-lifier with RS 485 interface 3-conductor 2-conductor

Output signal Sig≈ 2 mV/V≈ 1 mV/V for SK 2.0

1…9 mA4…20 mA12 ± 8 mA

4…20 mA12 ± 8 mA

0…5 V2.5 ± 2.5 V

0…10 V5 ± 5 V

± 10 V 0...32767 digits

Supply U b [V] < 10 10…30 10…30 6…30 11…30 12…30 6...30

Resolution [bit] – 11 11 14

Measuring rate – 1000 (optional 30….2000) Hz

Insulation resistance > 1 GΩ > 1 GΩ

Load –< (Ub − 6V) / Sig maxmax. 500 Ω

< (Ub − 8V) / Sig maxmax. 500 Ω

> 10 000 Ω –

Max. power consumption 40 mA 40 mA

Electrical protection Reverse voltage, overvoltage and short circuit protectionReverse voltage and overvoltage protection

Reverse voltage, overvoltage and short circuit protection

Cable type (if provided) FDCP plus, 4 x 0.25 mm², length 5 m

Electrical connection variants CableM 12 x 14-pole

CableM 12 x 15-pole

CableM 12 x 15-pole

CableM 12 x 15-pole

CableM 12 x 14-pole

Ub BN 1 BN 1 BN 1 BN 1 BN 1

Sig (+) GN 4 GN 4 BN 1 GN 4

GND WH 3 WH 3 WH 3 WH 3 WH 3

Sig − YE 2

A YE 4

B GN 2

Shield BK Housing BK Housing BK Housing BK Housing BK Housing

not connected 2; 5 2; 4; 5 2;5

Pole assignment

* Input bridge resistor ≈ 400 Ω | Output bridge resistor ≈ 350 Ω

4 Shear force transducer SK 1.x, SK 2.x | Product information | Status 03/2021© HKM-Messtechnik GmbH | Phone +49 761 89607 0 | www.hkm-messtechnik.com Subject to technical modifications

Options

» Design adaptation to customer specification » Accuracy ± 0.1% f.s. » Output available with test signal on request » Integrated measuring amplifier

› with ratiometric voltage input › with 2 switching outputs

Examples of design adaptations